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LMT SOLID AXLE 4WD MONSTER TRUCK • RTR: INSTRUCTION MANUAL
RUN TIME
The largest factor in run time is the capacity of the battery pack. A larger mAh rating increases
the amount of run time experienced.
The condition of a battery pack is also an important factor in both run time and speed.
The battery connectors may become hot during driving. Batteries will lose performance
and capacity over time.
Driving the vehicle from a stop to full speed repeatedly will damage the batteries
and electronics over time. Sudden acceleration will also lead to shorter run times.
TO IMPROVE RUN TIMES
• Keep your vehicle clean and well maintained.
• Allow more airflow to the ESC and motor.
• Change the gearing to a lower ratio. A lower ratio decreases the operating temperature
of the electronics. Use a smaller pinion gear or larger spur gear to lower the gear ratio.
• Use a battery pack with a higher mAh rating.
• Use the optimum charger to charge battery packs (Visit your local hobby dealer for
more information).
PRECAUTIONS
• Never touch moving parts.
• Never disassemble while the batteries are installed.
• Always let parts cool before touching.
• Rated for up to 3S batteries, not suitable for 4S batteries.
GEARING
Installing a pinion gear with fewer teeth will provide greater torque but will reduce top
speed. Likewise, a pinion gear with more teeth will reduce torque and increase top speed.
Care should be taken when installing larger pinion gears as this can "overgear" the vehicle,
resulting in overheating of the motor and ESC. When testing different gearing options, pay
close attention to the temperature of the motor and speed control to ensure you are operating
within the temperature range of the components. The motor or ESC should never be so hot
that it cannot be touched. If temperatures are too hot, a different gearing combination with a
lower pinion gear and/or higher spur gear is suggested.
CHANGING THE PINION GEAR/GEAR RATIO
1. Remove the screw holding the gear cover in place.
2. From the slot in the top of the gear box cover, loosen the pinion gear set screw and
remove the pinion gear.
3. Remove the motor mounting screws to remove the motor, or adjust the motor to the location
for the corresponding pinion gear.
4. Install the new pinion gear on your motor. Place the pinion gear on the end of the motor shaft so
that it lines up flush with the spur gear and the set screw is located over the flat on the shaft.
5. Tighten the pinion gear on the motor shaft and reinstall the upper gear cover.
SPEKTRUM
™
FIRMA
™
3150KV BRUSHLESS MOTOR
NOTICE:
It is important you select the correct motor mounting holes for your pinion gear
selection. The gear mesh is pre-set with each pair of motor mounting holes corresponding
to the pinion gear. Selecting the wrong mounting holes is likely to cause damage to the
spur gear on your LMT when you attempt to apply power.
The following drawing shows the correct motor mounting holes to use for the included
14 tooth pinion gear.
TELEMETRY SETTINGS
If using the Spektrum Dashboard app or the optional speedometer module on your
transmitter, set the motor pole count to 4 and the rollout distance to 1.10" (27.9mm).
REQUIRED TOOLS
1.5mm Hex Driver
2.0mm Hex Driver
2.5mm Hex Driver
5.5mm Nut Driver
8.0mm Nut Driver
LIST OF FLUIDS
Diff Fluids
Front and Rear
100k
Center
500k
Shock Oil
Front and Rear
25wt
STOCK PINION
14T MOD1, 5mm shaft
